Globe-holder.



No. 789,540. PATENTED MAY 9, 1905! G. E. HARTHAN.

GLOBE HOLDER.

APPLICATION FILED FEB. 9, 1903.

C C L o o L, H Ii F D M F E,

\A vcnessesz v lnveniior'. 5 Charles E.l-la;Zhan,

rrien ramps Patented May 9, 1905.

CHARLES E. HARTHAN, OF LYNN, MASSACHUSETTS, ASSIGNOR TO GEL-- ERALELECTRIC COMPANY, A CORPORATION OF NEW YORK.

GLOBE-HOLDEN.

SPECIFICATION forming part of Letters Patent No. 789,540, dated May 9,1905.

Application filed February 9, 1903. Serial No. 142,449.

To all whom it may concern.-

Be itknown that I, CHM-inns E. HAI-rrjrmN, a citizen of the UnitedStates, residingat Lynn, county of Essex, State of t/Iassachusetts, haveinvented certain new and useful Improvements in Globe-Holders, of whichthe following is a specification.

This invention relates to means for securing the outer globeof aninclosed arc-lamp to its support. Its object is to provide mechanismwhich will permit of pushing the globe into place with one hand in anyposition around the supporting-casing and which will hold the globesecurely against rattling and swinging. in accomplishing these objects Iform a flange or ring on the lower end of the casing by turning thesheet metal of the easing under and then over a wire. To the flange atthe open end of the inclosing globe is attached a metallic band. On thismetallic band I pivot two hooks, each provided with a spring adapted topress the hook outwardly away from the axis of the lamp to asubstantiall y vertical position. The hooks are formed with slantingheads, and when the globe is raised and the hooks pressed outward by thesprings the slanting heads are in line with the ring on the bottom ofthe casing. By this construction when the globe is pushed into positionthe heads oi. the hooks bear on the ring and are pressed in against thetension of the springs, and when the hooks get above the ring they aresprung outward, catching on the ring and holding the globe in place. Asthe globe does not have to be adjusted about the vertical axis of thelamp, it is obvious that it can be pushed into place with one hand, asan upward movement is all that is necessary.

To hold the globe firmly against vibration, ll mount a thumb-screw oneach side of the band, midway between the locking-hooks, in such aposition that when screwed up the ends bear on the ring of the casing.These thumb-screws draw the band down until the hooks catch tightly onthe ring, so that the globe is held securely to the casing at "fourpoints about its center.

To withdraw the globe, the thumb-screws are loosened, the globe raisedslightly, and the hooks pressed in by meansol studsmounted thereon. itcan then be lowered until it uncovers the inner globe, in which positionit hangs by a chain.

My invention therefore consists of means for securing a globe to itssupport by springpositioned hooks adapted to catch on a flange formed onthe globe-support and means for holding the globe securely in position.

1 have illustrated an embodiment of my invention in the accompanyingdrawing, which shows an elevation of a double-globe arclamp of ordinaryconstruction broken away in part.

Referring to the drawing, A is the lampcasing, and B the outer globe.The lower edge of the casing is turned under at C and over a wire hoop0, so that the casing and hoop form a stiff substantial flange or ringat the base of the casing. A metallic band Dis secured to the open endof the globe B by screws (Z bearing on the neck of the globe. Secured tothe outer side of the band I) at diametrically opposite points by rivetspassing through the band are two looped metallic holders E E, andbetween the holders and the bands are the lower ends of springs S S,also held in place by the rivets. The holders are provided with sidepieces E F, in which are pivoted the hooks H H. The springs S S at theirupper ends bear on the inner sidas of the hooks H H. In the positionshown the springs do not exert any force against the hooks; but when thehooks are pressed back they tend to return them to this position. Thehooks are provided with a slanting end, as at K, and their distanceapart is such that when the globe is raised into position these slantingends will bear on the ring C ol? the casing. Each hook is provided witha stud or push-pin L L for pressing the hook in against the tension ofthe spring. Mounted on each side of the band D, equidistant from thehooks, are thumb-screws M, which when turned up bear on the lower sideof the ring C. Connected to the band and to the lamp-casing by suitablescrews is a chain N of sufficient length to allow the globe whenreleased to hang free of the inner globe and the lower-carbon holder.The operation of the device is as follows: The lower globe is raiseduntil the slanting ends K K of hooks H H hit on ring C. When the globeis pushed up, springs S S and hooks H H are pressed back, and when theends of the hooks are above the ring the springs press them outward. Theglobe can then be released, as it is held in place by the hooks catchingon the flange. It is obvious that raising the globe into place thus canbe done by one hand, as it is only an upward movement of the globe, noadjustment about the vertical axis being necessary on account of thefact that the hooks can catch on the ring at any point. The thumb-screwsM are then turned up until they bear on the ring 0, thus holding theglobe securely in position. To remove the globe, the thumb-screws M areloosened. The globe is then raised slightly by the holders E E, with thefirst fingers through the loops in the holders and the thumbs on thestuds LL. The hooks are then pressed back against the action of thesprings S S and the globe lowered.

It is obvious that various changes in arrangement or the substitution ofequivalent parts can be made in any device without departing from thespirit of my invention.

What I claim as new, and desire to secure by Letters Patent of theUnited States, is

1. In an arc-lamp, a globe, a support, and means for securing the globeto its support consisting of an inturned flange on one member andspring-pressed hooks secured to the other.

2. In an arc-lamp, a casing, a globe, a flange on the casing, andspring-hooks secured to the globe and adapted to be sprungover theflange to hold the globe in position.

3. In an arc-lamp, a globe, a band secured to the open end thereof,hooks pivotally mounted on said band, and springs for positioning thehooks.

4. In an arc-lamp, a casing, a globe, aband secured to the open endthereof, spring-positioned hooks mounted on said band and adapted to besprung over the lamp-casing by an upward movement, and thumb screws alsomounted on the band and arranged to bear against the casing.

5. In an arc-lamp, a casing, aglobe, springhooks carried by the globeand adapted to be sprung over the lamp-casing by an upward movement, andmeans for facilitating the unlatching of the hooks.

6. In an arc-lamp, the combination with the lamp frame or casing, of aglobe, a band secured to the open end thereof, a looped metallic piecemounted on the band, a hook pivotally mounted on said metallic piece andadapted to be sprung over the casing by an upward movement, anda springfor positioning the hook.

7. In an arc-lamp, an ineurled casing, a globe, pivoted catches mountedon the globe at opposite points, and springs for positioning thecatches.

In witness whereof I have hereunto set my hand this 6th day of February,1903.

CHARLES E. HARTHAN.

WVitnesses:

HENRY C. SPINNEY, .DUGALJ) MoK. McKiLnor.

